Increase of enamel fluoride retention by low fluence argon laser in vivo.

Background And Objectives: The aim of this in vivo study was to investigate if argon laser irradiation of enamel can increase the retention of fluoride.

Study Design/materials And Methods: Ninety-eight teeth in 12 patients were randomly divided into three groups: (1) EF group: 40 teeth were only treated by fluoride gel (application for 5 minutes followed by 1 minute rinsing with distilled water). (2) EFL group: 40 teeth were treated the same way as in the EF group but they were lased after fluoridation.